scholarly journals Evolutionary epigenomic analyses in mammalian early embryos reveal species-specific innovations and conserved principles of imprinting

2021 ◽  
Vol 7 (48) ◽  
Author(s):  
Xukun Lu ◽  
Yu Zhang ◽  
Lijuan Wang ◽  
Leyun Wang ◽  
Huili Wang ◽  
...  
Keyword(s):  
Early Embryos ◽  
Species Specific

scholarly journals RNAseq analysis reveals dynamic metaboloepigenetic profiles of human, mouse and bovine pre-implantation embryos

2021 ◽  
Author(s):  
Marcella Pecora Milazzotto ◽  
Michael J Noonan ◽  
Marcia de Almeida Monteiro Melo Ferraz
Keyword(s):  
Pregnancy Rates ◽  
Vitro Fertilization ◽  
In Vitro Environment ◽  
Early Embryos ◽  
Rnaseq Data ◽  
Culture Strategies ◽  
Species Specific ◽  
Offspring Health

Metaboloepigenetic regulation (metabolites regulating the cellular epigenome inducing long-term changes), has been reported in stem cells, germ cells and tumor cells. Embryonic metaboloepigenetics, however, have just begun to be described. Here we analyzed RNAseq data to characterize the metaboloepigenetic profiles of human, mouse and bovine pre-implantation embryos. In embryos, metaboloepigenetic reprogramming is species specific, varies with the developmental stage and is disrupted with in vitro culture. Although the idea that the in vitro environment may influence embryo development is not new, there has been little progress on improving pregnancy rates after more than 43 years using in vitro fertilization. Hence, the present data on embryonic metaboloepigenetic will contribute to understanding how the in vitro manipulation affects the metaboloepigenetic status of early embryos, which can be used to establish culture strategies aimed at improving the in vitro environment and, consequently, pregnancy rates and offspring health.

Electron Microscopy in the Study of Natural Phytoplankton Assemblages

1985 ◽  
Vol 43 ◽  
pp. 620-623
Author(s):  
Linda Sicko-Goad
Keyword(s):  
Electron Microscopy ◽  
Aquatic Environment ◽  
Size Range ◽  
Physical Parameters ◽  
Specific Information ◽  
Phytoplankton Assemblages ◽  
Phytoplankton Productivity ◽  
Ecosystem Effects ◽  
Time Of Year ◽  
Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

64: Rapid, Species-Specific Detection of Uropathogens from Clinical Urine Specimens Using an Electrochemical Microsensor Array

2005 ◽  
Vol 173 (4S) ◽  
pp. 18-18
Author(s):  
Joseph C. Liao ◽  
Mitra Mastali ◽  
David A. Haake ◽  
Bernard M. Churchill
Keyword(s):  
Specific Detection ◽  
Species Specific ◽  
Urine Specimens

Interspecies versus Species-Specific.

1960 ◽  
Vol 15 (10) ◽  
pp. 665-665
Author(s):  
George S. Grosser
Keyword(s):  
Species Specific

Species Specific Immunoassays to Measure Blood Platelet and Coagulation Activation in the Rat

1996 ◽  
Vol 76 (06) ◽  
pp. 1090-1095 ◽  
Author(s):  
C Ravanat ◽  
M Freund ◽  
S Schuhler ◽  
P Grunert ◽  
L Meyer ◽  
...  
Keyword(s):  
Antithrombin Iii ◽  
Plasma Concentrations ◽  
Simultaneous Detection ◽  
Blood Platelet ◽  
Coagulation Activation ◽  
Platelet Factor ◽  
Prethrombotic State ◽  
Low Levels ◽  
Species Specific ◽  
Higher Sensitivity

SummaryThe purpose of this study was to develop specific and sensitive immunoassays to detect early indices of hypercoagulability in the rat. Rat platelet factor 4 (rPF4) and rat fibrinopeptide A (rFPA) assays, tools for the detection of activation of platelets and coagulation respectively, were designed using antibodies raised against purified rPF4 and against synthetic rFPA. The relevance of these new assays and of the commercially available ELISA kit for thrombin-antithrombin III (TAT) complexes was demonstrated in a rat model of a prethrombotic state induced by intravenous infusion of varying doses of thromboplastin (90 to 2400 μl/kg/h). In this model, the immunoassays allowed simultaneous detection of low levels of rFPA and rPF4 which were correlated with fibrinogen and platelet consumption and TAT generation and further proved to be of higher sensitivity than the classical methods of platelet count or measurement of fibrinogen levels. Plasma concentrations of rFPA, rPF4 and TAT were dependent on infusion time and thromboplastin dose, while hirudin (1 mg/kg) prevented their appearance. Thus the new specific immunoassays for rPF4 and rFPA and the commercial human TAT assay represent useful tools for pathophysiological studies or the screening of antithrombotic drugs in rats.

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